Definition of Relation. A relation is a set of ordered pairs. This seems like an odd definition but weâll need it for the definition of a function (which is the main topic of this section).
Classic (Swedish) massage and Thai massage have been proven to relieve chronic lower back pain. Classic massage for lower back pain is a technique that relaxes muscles in the area through the application of pressure. The area is rubbed in the direction in which blood flows back to the heart. Thai massage, on the other hand, is a technique that pulls and stretches the area of the back and neck.
1 A 2010 meta-analysis of 17 clinical trials concluded that massage therapy may help to reduce depression.  Brief, twice-weekly yoga and massage sessions for 12 weeks were associated with a decrease in depression, anxiety, and back and leg pain in pregnant women with depression, a 2012 NCCIH-funded clinical trial showed.